Pineteam, please cut the drama. It's a very simple discussion.
I have never ever encountered this interference you write about, and I have used just about every ANR headset currently on the market. I guess not everyone is susceptible. On top of that, it's very rarely the guys with an ANR headset who complain about the speaker volume. At the beginning of this topic I hinted that some individuals might be more susceptible to this interference than others, other than that there is no explanation why for some it seems to be a cardinal sin to keep the volume open whilst others hardly notice.